Some say that with a "proper IDE" or with "proper editing support" this is possible for other languages too, but I ultimately doubt it, for all languages, which do not mark the beginning and end of their expressions and all languages, which consist of a mix of statements and expressions. The point is, that the parentheses make it unmistakably clear, where something starts and ends, which means, that an editor has no problem figuring it out. If a language has statements and blocks and expressions and whatever else there is, but not delimited by tokens like parentheses, then there will be ambiguity. That ambiguity cannot be removed and hinders how good an editor can be at selecting exactly that portion of the code, that you want to select and possibly move or wrap in something or do whatever with.

Some languages replace such parentheses tokens with a "begin" and "end" keyword for example, but imagine what it would look like, if you had to use "begin" (5 characters) and "end" (3 characters) for really everything, for which parentheses in lispy languages are used. Now that would be a syntax nightmare.